Tub



FIG. 1 is a top perspective view of a tub showing the new design;

FIG. 2 is a front elevation view thereof, the rear elevation being a mirror image;

FIG. 3 is a left side elevation view thereof, the right side elevation being a mirror image;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines and the area within the broken line in FIG. 5 depict environmental subject matter that forms no part of the claimed design. 

CLAIM We claim the ornamental design for a tub, as shown and described. 